CN102981155A - Method and device for laser double-pulse detecting - Google Patents
Method and device for laser double-pulse detecting Download PDFInfo
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- CN102981155A CN102981155A CN2012104497673A CN201210449767A CN102981155A CN 102981155 A CN102981155 A CN 102981155A CN 2012104497673 A CN2012104497673 A CN 2012104497673A CN 201210449767 A CN201210449767 A CN 201210449767A CN 102981155 A CN102981155 A CN 102981155A
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Abstract
The invention relates to a method and a device for laser double-pulse detecting. The device is composed of a photovoltaic solar energy plate and a double single-stable module. The working process includes laser emitted by a laser distance measuring device directly shining on the photovoltaic solar energy plate, and transforming laser pulse signals to voltage pulse signals and outputting the voltage pulse signals to the double single-stable module, after a first voltage pulse signal is accepted by the double single-stable module, a MONO 1 outputting high levels at the A end, meanwhile removing a resetting state of a MONO 2, and after a second voltage pulse signal is accepted by the double single-stable module, the MONO 2 outputting high level signals at the B end, namely showing an acceptance of laser double-pulse. The method and the device for laser double-pulse detecting take the photovoltaic solar energy plate which is coated with an infrared membrane layer as a photoelectric conversion device and catch laser pulse signals with low background noise and a large action area, thereby being unique in method, practical and effective, low in cost, convenient to carry, high in accuracy of laser pulse detection and provided with flexible back end configuration.
Description
Technical field
The invention belongs to the laser detection field, be specifically related to a kind of laser dipulse detection method and device.
Background technology
In the pulsed laser ranging technology, in order to guarantee the precision of laser ranging, require laser range finder can only launch single laser pulse, can not launch dipulse or multiple-pulse.The laser instrument of general pulse laser laser welder has monopulse level ground district scope, can not launch dipulse and multiple-pulse in this scope.Monopulse level ground district scope is an important technology index of pulse laser laser welder laser instrument.The threshold value lower limit correspondence of monopulse level ground district scope the pulse laser laser welder laser instrument without Laser output, and upper threshold i.e. corresponding pulse laser laser welder laser instrument emission dipulse.In the production and processing of pulse laser laser welder laser instrument, it is very necessary to examine and determine this threshold value.In addition, in the use procedure of laser range finder, be subjected to the factor affecting such as self performance is aging, ambient temperature variation, this threshold value can change, thereby affects the laser range finder distance accuracy.Therefore, in the laser range finder after sale service, when particularly keeping in repair, it is also very necessary to examine and determine this threshold value.
In order to examine and determine the monopulse level ground district scope of pulse laser laser welder laser instrument, " oscillograph observation method " generally used in factory with good conditionsi and maintenance center, the laser pulse of namely exporting with the photoelectric probe Direct Acquisition, perhaps indirectly catch the sampled signal of laser range finder with voltage probe, then observe at oscillograph.The method equipment cost is higher and require the testing staff to possess certain technical merit.In the place without this condition, what use at present is " laser dotting+actual load detection method ", namely checks to use condenser that the laser of output is converged on the photographic paper under the threshold value in limited time, and whether then observe has the ablation spot; Directly with the range finding of laser range finder subtend clear sky, then observe whether random number of the result data that records when checking upper threshold.The method is simple, equipment cost is low but at detection threshold in limited time, is subject to the factor affecting such as weather, cloud layer and causes accuracy not high.At present, also be that the inspection of laser instrument output dipulse there is no accurately, method and apparatus cheaply to this upper threshold.
Summary of the invention
The invention provides a kind of upper threshold laser dipulse detection method and device for accurately examining and determine pulse laser laser welder laser instrument monopulse level ground district scope,
The present invention is by the following technical solutions: a kind of laser dipulse pick-up unit, comprise photovoltaic solar panel and two monostable module, the photovoltaic solar panel surface is coated with the infrared film layer, infrared rete cutoff wavelength is 900nm, and the core of described two monostable modules adopts SN74HC123A pair can trigger one shot multivibrator again.
The major function of photovoltaic solar panel is laser pulse signal to be converted to voltage pulse signal export to two monostable modules, the infrared rete that the photovoltaic solar panel surface is coated with, can reduce ground unrest and eliminate the visible light interference, guaranteeing simultaneously has good transmitance to the laser that is in near-infrared band, the 1.06 μ m laser that can the significant response laser range finder send, large because of its active area simultaneously, the exploring laser light signal is more prone to.Described two monostable module major function is the voltage pulse signal dipulse whether of differentiating input, and provides corresponding level signal at output terminals A, B.
The reset mode of MONO2 in described two monostable module is by the output signal control of MONO1, to guarantee that MONO2 is in reset mode all the time before first pulse arrives; MONO1 adopts negative edge to trigger, and after first pulse signal passed through, MONO1 output high level was removed the reset mode of MONO2, to guarantee that MONO2 can capture second pulse signal; Thereby greatly strengthened the reliability of system works.Adopting the two signal wire way of outputs, is monopulse or dipulse or multiple-pulse by judging that two signal logic level can be told the laser pulse signal that whether receives laser pulse signal or catch; The monostable pulse signal of 2s that the output of two signal wires can be repeated to trigger, this signal can be used as LED and drive signal or export to single chip microcomputer test system.
Preferably, described photovoltaic solar panel adopts circular single crystal silicon solar plate, and diameter is 6cm.Adopt circular single crystal silicon solar plate, photoelectric transformation efficiency is high; Diameter is 6cm, satisfies the maximum spot diameter demand in laser range finder near field commonly used.
A kind of laser dipulse detection method the steps include:
The laser pulse of a, laser range finder emission shines directly on the photovoltaic solar panel that the surface is coated with the infrared film layer, exports to two monostable modules after being converted to voltage pulse signal;
B, two monostable module are exported high level by MONO1 at the A end after receiving first voltage pulse signal, remove simultaneously the reset mode of MONO2;
C, two monostable module are exported high level signal by MONO2 at the B end after receiving second voltage pulse signal, i.e. expression receives the laser dipulse.
The invention has the beneficial effects as follows: the present invention adopts the surface to be coated with the photovoltaic solar panel of infrared film layer as electrooptical device, catch laser pulse signal with low ground unrest and large active area, method is unique, practicability and effectiveness, with low cost, be easy to carry, the accuracy of exploring laser light dipulse is high, and has flexibly backend arrangement.
Description of drawings
Fig. 1 is the system schematic of the embodiment of the invention;
Fig. 2 is the working timing figure of the embodiment of the invention;
Fig. 3 is the menu of the embodiment of the invention;
Among the figure: 1, photovoltaic solar panel, 2, two monostable module.
Embodiment
The below further explains, illustrates the technical program with the embodiment of indefiniteness.
A kind of laser dipulse detection method and device as shown in Figure 1, are connected to form by photovoltaic solar panel and two monostable module two parts.
Described photovoltaic solar panel adopts the high mono-crystalline silicon solar plate of photoelectric transformation efficiency, is processed into circle, and diameter is 6cm,, its surface is coated with the infrared rete that cutoff wavelength is 900nm.
The core of described two monostable modules adopts SN74HC123A pair can trigger one shot multivibrator again, and it is 43K Ω that outside Resistor-Capacitor Unit is selected Rt, and Ct is 47 μ F, so that the monostable pulses width time is about 2s.The pulse of this time width can directly as the driving signal of LED, be satisfied the needs that eye-observation is differentiated.
Specific works flow process of the present invention is: as shown in Figure 1, the laser pulse of laser range finder emission shines directly on the photovoltaic solar panel that is coated with infrared rete, and photovoltaic solar panel is exported to two monostable modules after laser pulse signal is converted to voltage pulse signal; Laser pulse signal and voltage pulse signal have strict corresponding relation.Two monostable modules receive from the voltage pulse signal of photovoltaic solar panel output, after first voltage pulse signal arrives, trigger MONO1 output monostable pulses at negative edge, namely at the high level signal of A end output about 2s time, this high level signal has been removed the reset mode of MONO2 simultaneously; After second voltage pulse signal arrives, trigger MONO2 output monostable pulses at rising edge, namely at the high level signal of B end output about 2s time, i.e. expression receives the laser dipulse.
Claims (3)
1. laser dipulse pick-up unit, it is characterized in that: comprise photovoltaic solar panel and two monostable module, the photovoltaic solar panel surface is coated with the infrared film layer, infrared rete cutoff wavelength is 900nm, and the core of described two monostable modules adopts SN74HC123A pair can trigger one shot multivibrator again.
2. a kind of laser dipulse pick-up unit according to claim 1 is characterized in that: described photovoltaic solar panel adopts circular single crystal silicon solar plate, and diameter is 6cm.
3. a laser dipulse detection method the steps include:
The laser pulse of a, laser range finder emission shines directly on the photovoltaic solar panel that the surface is coated with the infrared film layer, exports to two monostable modules after being converted to voltage pulse signal;
B, two monostable module are exported high level by MONO1 at the A end after receiving first voltage pulse signal, remove simultaneously the reset mode of MONO2;
C, two monostable module are exported high level signal by MONO2 at the B end after receiving second voltage pulse signal, i.e. expression receives the laser dipulse.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104497673A CN102981155A (en) | 2012-11-12 | 2012-11-12 | Method and device for laser double-pulse detecting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104497673A CN102981155A (en) | 2012-11-12 | 2012-11-12 | Method and device for laser double-pulse detecting |
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| CN102981155A true CN102981155A (en) | 2013-03-20 |
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| CN2012104497673A Pending CN102981155A (en) | 2012-11-12 | 2012-11-12 | Method and device for laser double-pulse detecting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953645A (en) * | 2021-01-27 | 2021-06-11 | 吉林大学 | System and method for simultaneously realizing laser ranging and communication |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6324196B1 (en) * | 1999-03-17 | 2001-11-27 | Lambda Physik Ag | Diagnosis of the trigger chain of a pulsed laser |
| CN202093137U (en) * | 2011-03-28 | 2011-12-28 | 天津瑞能电气有限公司 | Parameter test platform for intelligent power module group |
-
2012
- 2012-11-12 CN CN2012104497673A patent/CN102981155A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6324196B1 (en) * | 1999-03-17 | 2001-11-27 | Lambda Physik Ag | Diagnosis of the trigger chain of a pulsed laser |
| CN202093137U (en) * | 2011-03-28 | 2011-12-28 | 天津瑞能电气有限公司 | Parameter test platform for intelligent power module group |
Non-Patent Citations (2)
| Title |
|---|
| 刘海波: "多电平变流器的移相PWM控制专用集成电路的研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
| 包国玉 等: "同时测量重复频率激光脉宽和能量的实时测试系统", 《光电子 激光》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953645A (en) * | 2021-01-27 | 2021-06-11 | 吉林大学 | System and method for simultaneously realizing laser ranging and communication |
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Effective date of abandoning: 20170822 |
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